The effect of magnetic field configuration on the performance of minimum-B ECR ion source
Main funder
Funder's project number: 315855
Funds granted by main funder (€)
- 468 468,00
Funding program
Project timetable
Project start date: 01/09/2018
Project end date: 31/08/2022
Summary
The performance of Electron Cyclotron Resonance Ion Sources (ECRIS), producing high charge state ions from a great variety of elements, has improved dramatically over the past decades, thus enabling significant advances in accelerator-based nuclear physics and applications. Further advances in nuclear physics research and applications require constant development of the ion source technology in terms of variety and intensity of available ion beams. The design of modern ECR ion sources is based on semi-empirical scaling laws, suggesting most importantly that the extracted current at the peak of the ion charge state distribution scales with the applied microwave frequency squared. Fulfilling the magnetic field scaling laws sets a practical limit for conventional ECRIS development relying on room-temperature (RT) technology. Increasing the frequency beyond 56 GHz requires either accepting a substandard field strength or R&D on innovative ECRIS concepts, e.g. the ARC-ECRIS feasible up to 100 GHz.
The proposed study consists of three complimentary approaches to study the effect of the magnetic field topology on ECR ion source performance and its stability. We plan to commission a prototype ECR ion source with a magnetic field configuration similar to that of the proposed ARC-ECRIS concept -- and to demonstrate its feasibility for high charge state ion beam production. We propose to utilize a rectangular slit extraction instead of the conventional round aperture. The choice is driven by the desire to optimize the geometrical overlap of the extraction system with the pattern of plasma losses. We propose to study the role of the magnetic field strength and gradient on the appearance and nature of the kinetic instabilities inherent to ECRIS plasmas. Both, conventional (solenoid + sextupole) and new innovative prototype would be utilized for this subtask. The project has a wide international aspect and impact. As an example, the thesis work described in the application is a joint research (cotutelle) between University of Jyväskylä (Finland) and University of Grenoble Alpes (France). The research project paves the way for next generation ECR ion sources and carries significant potential for a major breakthrough in ion source physics and technology.
The proposed study consists of three complimentary approaches to study the effect of the magnetic field topology on ECR ion source performance and its stability. We plan to commission a prototype ECR ion source with a magnetic field configuration similar to that of the proposed ARC-ECRIS concept -- and to demonstrate its feasibility for high charge state ion beam production. We propose to utilize a rectangular slit extraction instead of the conventional round aperture. The choice is driven by the desire to optimize the geometrical overlap of the extraction system with the pattern of plasma losses. We propose to study the role of the magnetic field strength and gradient on the appearance and nature of the kinetic instabilities inherent to ECRIS plasmas. Both, conventional (solenoid + sextupole) and new innovative prototype would be utilized for this subtask. The project has a wide international aspect and impact. As an example, the thesis work described in the application is a joint research (cotutelle) between University of Jyväskylä (Finland) and University of Grenoble Alpes (France). The research project paves the way for next generation ECR ion sources and carries significant potential for a major breakthrough in ion source physics and technology.
Principal Investigator
Other persons related to this project (JYU)
Primary responsible unit
Related publications and other outputs
1 of 2
- Ion source and low energy beam transport prototyping for a single-ended heavy ion ToF-ERDA facility (2023) Tarvainen, Olli; et al.; A1; OA
- Diagnostics of highly charged plasmas with multicomponent 1+ ion injection (2022) Luntinen, M.; et al.; A1; OA
- Diagnostic techniques of minimum-B ECR ion source plasma instabilities (2022) Toivanen, V.; et al.; A1; OA
- First results of a new quadrupole minimum-B permanent magnet electron cyclotron resonance ion source (2022) Kalvas, Taneli; et al.; B1
- Influence of axial mirror ratios on the kinetic instability threshold in electron cyclotron resonance ion source plasma (2022) Toivanen, V.; et al.; A1; OA
- Quasi-periodical kinetic instabilities in minimum-B confined plasma (2022) Bhaskar, B. S.; et al.; A1; OA
- Controlled turbulence regime of electron cyclotron resonance ion source for improved multicharged ion performance (2021) Skalyga, Vadim; et al.; A1; OA
- ECRIS plasma spectroscopy with a high resolution spectrometer (2020) Kronholm, R.; et al.; A1; OA
- Estimating ion confinement times from beam current transients in conventional and charge breeder ECRIS (2020) Marttinen, M.; et al.; A1; OA
- Measurements of the energy distribution of electrons lost from the minimum B-field : the effect of instabilities and two-frequency heating (2020) Izotov, I.; et al.; A1; OA
Related research datasets
- JYFL-ACCLAB-ISG001-First experimental results of CUBE-ECRIS (2022) Toivanen, Ville; et al.
- JYFL-ACCLAB-ISG002 Studies of CUBE-ECRIS performance with slit extraction (2023) Toivanen, Ville; et al.
- JYFL-ACCLAB-ISG003 CUBE-ECRIS operation with 2-frequency heating and gas mixing (2023) Toivanen, Ville; et al.
- JYFL-ACCLAB-ISG004 Study of the temporal structure of kinetic instabilities in ECR-heated plasma (2023) Subhash Bhasi Bhaskar, Bichu; et al.
- JYFL-ACCLAB-ISG005 Probing the correlation between bremsstrahlung and escaping electrons from ECRIS plasma (2023) Subhash Bhasi Bhaskar, Bichu; et al.
